山地旱作区
Mountainous and arid area
水旱轮作
Paddy rice with upland crop rotation system
Rotation of rice and upland crops
Dryland crop and paddy rice rotation
paddy rice-upland crop rotation
Rice-wheat Rotation
paddy-upland rotation
rotation of rice and dry crops
paddy rice and dryland crops rotation
Paddy-dryland rotation
FA旱地龙
FA yellow-humic acid drought resistance agent
FA handinong
FA
fulvic acid
FA handilong
半干旱地区生态系统
Semi-arid land ecosystems
半干旱和半湿润易旱地区
the semi-arid area and semi-moist area which incline to be arid
半期旱作
half period dry management
北方旱地农业
Dry Land Agriculture in North China